Hi
Does your camera have a hot shoe? If so, you might be able to mount an RDF onto it.
If not, see the link below. Slip the adapter between your camera and mount, and add the RDF to one side.
Mount adapter link
https://www.bhphotovideo.com/c/produ...extension.html
Hot shoe RDF link
http://www.365astronomy.com/Blitz-Ho...der-COMBO.html
Hot shoe mount for smart phone anyone?
http://www.ebay.com.au/itm/DSLR-Smar...-/181240118647
Another link to look at
https://stargazerslounge.com/topic/1...ed-dot-finder/
Have fun
Philip